I was desperate from powder deprivation. When I saw Gb selling powders made by or for Fort Smith Munitions labeled FSP-680 it states as H4198. I was able to purchase 2 Kegs at $290 to my door. I think the has mat was $80. I plan to load 444 Marlin, 450 Marlin, and 45-70. Has anyone else used this powder? And on what calibers? With what kind of results?